CN112260573A - Stretchable friction nano generator and preparation method thereof - Google Patents
Stretchable friction nano generator and preparation method thereof Download PDFInfo
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- CN112260573A CN112260573A CN202011083183.XA CN202011083183A CN112260573A CN 112260573 A CN112260573 A CN 112260573A CN 202011083183 A CN202011083183 A CN 202011083183A CN 112260573 A CN112260573 A CN 112260573A
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- 229920001971 elastomer Polymers 0.000 claims description 22
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- 239000002243 precursor Substances 0.000 claims description 16
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 13
- 229910052731 fluorine Inorganic materials 0.000 claims description 13
- 239000011737 fluorine Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000010041 electrostatic spinning Methods 0.000 claims description 12
- 229920000642 polymer Polymers 0.000 claims description 10
- 238000007590 electrostatic spraying Methods 0.000 claims description 9
- 239000002105 nanoparticle Substances 0.000 claims description 9
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N1/00—Electrostatic generators or motors using a solid moving electrostatic charge carrier
- H02N1/04—Friction generators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/02—Processes for applying liquids or other fluent materials performed by spraying
- B05D1/04—Processes for applying liquids or other fluent materials performed by spraying involving the use of an electrostatic field
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0015—Electro-spinning characterised by the initial state of the material
- D01D5/003—Electro-spinning characterised by the initial state of the material the material being a polymer solution or dispersion
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/0007—Electro-spinning
- D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
- D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
- D01D5/0084—Coating by electro-spinning, i.e. the electro-spun fibres are not removed from the collecting device but remain integral with it, e.g. coating of prostheses
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- Chemical & Material Sciences (AREA)
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Abstract
The invention provides a stretchable friction nano-generator and a preparation method thereof. The stretchable friction nano-generator includes: the stretching and electricity generating layer is internally provided with a closed cavity, the cavity is suitable for being filled with liquid metal, the closed cavity comprises a first cavity and a plurality of pore channels distributed along the circumferential direction of the first cavity, and the liquid metal is suitable for flowing between the pore channels and the first cavity; an electrode layer adapted to be connected to a surface of the tensile charge layer. The invention can stretch and release the stretching electrification layer in multiple directions, so that liquid metal flows back and forth between the first cavity and the pore channel, and induction charges are generated on the surface of the stretching electrification layer.
Description
Technical Field
The invention relates to the technical field of friction nano generators, in particular to a stretchable friction nano generator and a preparation method thereof.
Background
The friction nano generator is a novel self-driven energy collecting device, and converts small mechanical energy into electric energy by utilizing the coupling of a friction electrification effect and an electrostatic induction effect. It is widely used in flexible and stretchable energy sources due to its simple design, wide material selectivity and high output performance. The stretchable friction nano generator has important application in flexible electronic and wearable devices.
Currently most stretchable generators are generally based on two structures: firstly, utilizing the effective contact separation of a pre-treated wrinkling electrification layer in the stretching process to realize electric energy output; and secondly, generating an electric output based on the contact separation of the elastic electrification material and the liquid in the stretching process. Although there have been many important advances in the tensile friction nano-generator with the two structures, the tensile friction nano-generator only allows the friction nano-generator to generate electric output in a single stretching direction, and the common elastic electrification material has low friction charge density, so the electric energy output of the tensile friction nano-generator is low.
Disclosure of Invention
The invention solves the problems of lower electric energy output and single stretching direction of the existing stretchable friction nano generator.
To solve at least one aspect of the above problems, the present invention provides a stretchable friction nanogenerator, comprising:
the stretching and electricity generating layer is internally provided with a closed cavity, the closed cavity is suitable for being filled with liquid metal and comprises a first cavity and a plurality of pore channels distributed along the circumferential direction of the first cavity, and the liquid metal is suitable for flowing between the pore channels and the first cavity;
an electrode layer adapted to be connected to a surface of the tensile charge layer.
Preferably, the first cavity is of a positive poisson's ratio annular structure, and the duct is of a negative poisson's ratio structure, or the first cavity is of a negative poisson's ratio annular structure, and the duct is of a positive poisson's ratio structure.
Preferably, the cross-sectional area of the end of the hole connected with the first cavity is smaller than that of the end of the hole far away from the first cavity.
Preferably, the duct includes a second cavity and a connecting channel for connecting the first cavity and the second cavity.
Compared with the prior art, the stretchable friction nano generator provided by the invention has the following beneficial effects:
according to the invention, the closed cavity with a special structure is arranged in the stretching electrification layer, so that the pore passages are distributed along the circumferential direction of the first cavity, the stretching electrification layer can be stretched in multiple directions, and liquid metal flows back and forth between the inner first cavity and the outer pore passages, so that induced charges are generated on the surface of the stretching electrification layer.
The invention also provides a preparation method of the stretchable friction nano generator, which comprises the following steps:
placing a precursor material of the stretching electrification layer in a mould for curing treatment to obtain the stretching electrification layer with a closed cavity arranged inside, wherein the closed cavity is suitable for being filled with liquid metal, the closed cavity comprises a first cavity and a plurality of pore channels distributed along the circumferential direction of the first cavity, and the liquid metal is suitable for flowing between the first cavity and the pore channels;
preparing an electrode layer by simultaneously carrying out high-voltage electrostatic spraying on the liquid metal micro-nano particles and high-voltage electrostatic spinning on the high-molecular elastomer material;
and assembling the stretching electrification layer and the electrode layer together to prepare the stretchable friction nano generator.
Preferably, the step of placing the precursor material of the charge stretching layer in a mold for curing treatment to obtain the charge stretching layer with a closed cavity defined therein comprises:
placing the precursor material of the stretching electrification layer in a first mould for curing treatment to obtain a first model, wherein one surface of the first model is provided with a groove structure, the groove structure comprises a first groove arranged in the middle of the first model and a plurality of second grooves arranged in the circumferential direction of the first groove, and the first groove is communicated with the second grooves;
filling the liquid metal into the groove structure;
pouring the precursor material of the stretching electrification layer into a second mould, and carrying out curing treatment to obtain a second model, wherein the second model is a cover body suitable for covering the groove structure;
and covering the second model on the groove structure, and curing to complete the packaging of the first model and the second model, wherein the groove structure and the cover body surround to form the closed cavity of the stretching and electrification layer.
Preferably, the step of placing the precursor material of the charge stretching layer in a mold for curing treatment to obtain the charge stretching layer with a closed cavity defined therein comprises:
placing the precursor material of the stretching electrification layer in a first mould for curing treatment to obtain a first model, wherein one surface of the first model is provided with a groove structure, the groove structure comprises a first groove arranged in the middle of the first model and a plurality of second grooves arranged in the circumferential direction of the first groove, and the first groove is communicated with the second grooves;
filling liquid metal into the groove structure;
and packaging the two first models together, and enclosing the two groove structures to form the closed cavity of the stretching and electrification layer.
Preferably, the method for preparing the electrode layer by simultaneously spraying the liquid metal micro-nano particles and the high-voltage electrostatic spinning polymer elastomer material by using high-voltage static electricity comprises the following steps:
preparing a fluorine-containing solution of a high-molecular elastomer material and an alcohol solution of liquid metal;
and simultaneously applying positive voltage to one end of the fluorine-containing solution of the high polymer elastomer material and one end of the alcohol solution of the liquid metal, applying negative voltage to the receiving roller, rotating the receiving roller, and simultaneously performing electrostatic spraying and electrostatic spinning to prepare the electrode layer.
Preferably, the injection speed of the fluorine-containing solution of the high molecular elastomer material is (0.1-0.15) ml/min, the injection speed of the alcohol solution of the liquid metal is (0.05-0.1) ml/min,
preferably, the concentration of the fluorine-containing solution of the polymer elastomer material is 4% and the concentration of the alcoholic solution of the liquid metal is 20%.
Compared with the prior art, the preparation method of the stretchable friction nano generator provided by the invention has the following beneficial effects:
according to the invention, the sealed cavity is arranged in the stretching electrification layer, the sealed cavity is composed of the pore canal and the first cavity, and the pore canal is distributed along the circumferential direction of the first cavity, so that the stretching electrification layer is stretched or released, liquid metal flows back and forth between the first cavity and the pore canal, and the liquid metal can flow in the sealed cavity no matter which direction the stretching electrification layer is stretched, thus the multidirectional output of the generator is realized, and the electric energy output capability of the generator is improved. And because the preparation of the electrode layer is carried out by adopting electrostatic spinning and electrostatic spraying at the same time, when the stretched electrification layer is stretched, the liquid metal micro-nano particles can restrict the fiber grid structure to move, so that the friction force of the stretched electrification layer during stretching is increased, the surface potential and the charge density of the electrode layer are enhanced, and the electrical property output capability of the friction nano generator is improved.
Drawings
FIG. 1 is a schematic structural diagram of a tensile charge layer of a tensile triboelectric nanogenerator in an embodiment of the invention;
FIG. 2 is a schematic structural diagram of an electrode layer of the stretchable friction nano-generator according to an embodiment of the present invention;
fig. 3 is a flow chart illustrating a process for manufacturing a stretchable friction nanogenerator according to another embodiment of the invention.
Description of reference numerals:
1-stretching the charge layer; 11-a first cavity; 12-a duct; 121-connecting channel; 122-a second cavity; 2-electrode layer.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Referring to fig. 1 and 2, an embodiment of the present invention provides a stretchable friction nano-generator, including:
the stretching electrification layer 1 is internally provided with a closed cavity which is suitable for being filled with liquid metal and comprises a first cavity 11 and a plurality of pore canals 12 distributed along the circumferential direction of the first cavity 11, and the liquid metal is suitable for flowing between the pore canals 12 and the first cavity 11;
the electrode layer 2 is suitable for being connected to the surface of the charge stretching layer 1, and the charge stretching layer 1 and the electrode layer 2 are stacked and assembled together, for example, the electrode layer 2 is adhered to the lower surface of the charge stretching layer 1, but the electrode layer 2 may be disposed on the upper surface of the charge stretching layer 1 by other means.
In the friction nano-generator provided in this embodiment, a closed cavity with a special structure is disposed in the tensile electrification layer 1, and the closed cavity includes a first cavity 11 located in the middle of the tensile electrification layer 1 and a plurality of pores 12 distributed in the circumferential direction of the tensile electrification layer 1. When the stretching electrification layer 1 is stretched or released, the liquid metal is suitable for flowing between the first cavity 11 and the pore channel 12, so that induced charges are generated on the surface of the stretching electrification layer 1, the induced charges comprise induced positive charges and induced negative charges, the electrode layer 2 is suitable for collecting the induced negative charges, and the electrode layer 2 is connected with an external circuit through a lead to realize charge output.
Because the pore channels 12 are distributed along the circumferential direction of the first cavity 11, no matter which direction the stretching electrification layer 1 is stretched, the liquid metal can flow back and forth between the inner first cavity 11 and the outer pore channel 12, the limitation of the electrical output of the generator in the output direction is eliminated, and compared with the existing friction nano generator which only generates the electrical output in a single stretching direction, the generator of the embodiment has larger electrical output capacity.
In some embodiments, the first cavity 11 has a positive poisson's ratio annular structure, and the duct 12 has a negative poisson's ratio structure. Poisson's ratio is the ratio of the absolute value of the transverse positive strain to the axial positive strain of a material when it is under unidirectional tension or compression. When the material is stretched, it shrinks transversely, and this kind of material is positive poisson ratio material. When a material is stretched, it expands laterally in the elastic range, while when compressed, it contracts laterally, which is a negative poisson's ratio material.
In this embodiment, a closed cavity with a special structure is arranged in the tensile electrification layer 1, and different poisson ratio effects are generated at different positions of the closed cavity through the structural design of the pore passage, in a preferred embodiment, the first cavity 11 in the closed cavity has a positive poisson ratio effect, the pore passage 12 in the closed cavity has a negative poisson ratio effect, when the tensile electrification layer 1 is stretched, the pore passage 12 expands laterally, the first cavity 11 contracts laterally, liquid metal flows into the pore passage 12 from the first cavity 11, when the tensile electrification layer 1 is stretched and released, the pore passage 12 contracts laterally, the first cavity 11 expands laterally, and the liquid metal flows into the first cavity 11 from the pore passage 12. In this way, by continuously stretching and releasing the stretching electrification layer 1, the liquid metal continuously flows back and forth in the first cavity 11 and the pore 12, and further positive and negative charges are induced on the surface of the stretching electrification layer 1. Of course, in other embodiments, the first cavity 11 may have a negative poisson's ratio annular structure, and the duct 12 may have a positive poisson's ratio structure.
In some embodiments, the cross-sectional area of the end of the bore 12 connected to the first cavity 11 is smaller than the cross-sectional area of the end of the bore 12 remote from the first cavity 11, the cross-sectional area being taken perpendicular to the radial direction of the first cavity 11, so that liquid metal can be stored at the end of the bore 12 remote from the first cavity 11. And it can be understood that, since the circumference of the first cavity 11 around the periphery thereof is increased from the end close to the first cavity 11 to the end far from the first cavity 11, although the cross-sectional area of the end of the duct 12 far from the first cavity 11 is larger, the end of the duct 12 far from the first cavity 11 can be uniformly distributed along the axial direction due to the length of the circumference far from the first cavity 11. Therefore, more pore channels 12 can be distributed in the circumferential direction of the first cavity 11, and theoretically, the more the pore channels 12 are, the more the liquid metal flows between the first cavity 11 and the pore channels 12, the more the charges are induced on the surface of the tensile generating layer 1, and further the electric energy output capability of the friction nano-generator is improved.
In one embodiment, the duct 12 includes a second cavity 122 and a connecting channel 121, and the connecting channel 121 is an elongated channel for connecting the first cavity 11 and the second cavity 122. In this manner, during the stretching and releasing of the charge generating layer 1, the liquid metal flows between the first cavity 11 and the second cavity 122, thereby inducing charges on both the upper and lower surfaces of the charge generating layer 1. Alternatively, the shapes of the first cavity 11 and the second cavity 122 may be circular, polygonal or elliptical, and the shape is not limited by the embodiment. The shape of the first cavity 11 is preferably circular and the shape of the connecting channel 121 is preferably elongated rectangular.
Referring to fig. 3, another embodiment of the present invention provides a method for manufacturing a stretchable friction nanogenerator, including:
elastomer such as thermoplastic polyurethane, silica gel and the like is used as precursor material, a stretching electrification layer 1 with a closed cavity limited inside is prepared by a 3D printing mold auxiliary method, and liquid metal is filled into the closed cavity, wherein the closed cavity comprises a first cavity 11 and a plurality of pore channels 12 distributed along the circumferential direction of the first cavity 11, and the liquid metal is suitable for flowing between the first cavity 11 and the pore channels 12;
preparing an electrode layer 2 by simultaneously carrying out high-voltage electrostatic spraying on the liquid metal micro-nano particles and high-voltage electrostatic spinning on the high-molecular elastomer material;
and assembling the stretching electrification layer 1 and the electrode layer 2 together to prepare the stretchable friction nano generator. Thus, when the liquid metal is drawn across the sides of the cell 12, charge traps are formed on the surface of the elastomer, and these trapped charges are electrostatically induced by the electrode layer 2, which causes the transfer of electrons from the external circuit, creating an alternating current.
Wherein, the stretching electrification layer 1 and the electrode layer 2 can be adhered together by an ultrathin VHB tape, so that the electrode layer 2 is connected with one surface of the stretching electrification layer 1 and is used for collecting the induced charges on the surface of the stretching electrification layer 1.
In some embodiments, the closed cavity in the charge stretching layer 1 is formed by:
the precursor material is placed in a first mold to be cured to obtain a first model. The liquid metal filling mold comprises a first mold, a second mold and a plurality of grooves, wherein a groove structure is arranged on one surface of the first mold, the groove structure comprises a first groove arranged in the middle of the first mold and a plurality of second grooves arranged in the circumferential direction of the first groove, the first groove is communicated with the second grooves, and then liquid metal is filled into the groove structure, preferably the first groove.
And then, pouring a precursor material into a second mold with the size corresponding to that of the first mold, and solidifying to obtain a second model, wherein the second model is a cover body suitable for covering the first model.
And finally, covering the second model on the groove structure of the first model, heating and curing to finish the packaging of the first model and the second model, and obtaining the stretching electrification layer 1 with a closed cavity limited inside, wherein the closed cavity is limited by the groove structure and the second model covered on the groove structure.
In other embodiments, the closed cavity in the charge stretching layer 1 is formed by:
firstly, placing a precursor material in a first mould for solidification to obtain a first model, and filling liquid metal into a groove structure of the first model;
the two first molds are packaged together and the two groove structures together define a closed cavity forming the tensile charge layer 1.
In some embodiments, the preparing the electrode layer 2 by using a method of simultaneously performing high-voltage electrostatic spraying on the liquid metal micro-nano particles and high-voltage electrostatic spinning on the high-molecular elastomer material comprises:
preparing a fluorine-containing solution of a high-molecular elastomer material and an alcohol solution of liquid metal;
simultaneously applying positive voltage of 8-15kV to the fluorine-containing solution end of the high polymer elastomer material and the alcohol solution end of the liquid metal, applying negative voltage of 2kV to the receiving roller, rotating the receiving roller, and simultaneously performing electrostatic spraying and electrostatic spinning, wherein the pushing speed of the fluorine-containing solution of the high polymer elastomer material is (0.1-0.15) ml/min, the pushing speed of the alcohol solution of the liquid metal is (0.05-0.1) ml/min, forming a fiber grid structure filled with liquid metal micro-nano particles on the receiving roller, and taking the fiber grid structure off from the receiving roller to serve as an electrode layer 2.
In this example, the fluorine-containing solution of the polymer elastomer material was obtained by dissolving the polymer elastomer material in a fluorine-containing solvent, and the concentration of the solution was 4%. The fluorinated solvent is preferably a protonated fluorinated solvent, and in particular embodiments, the fluorinated solvent is preferably hexafluoroisopropanol, trifluoroethanol, trifluoroacetic acid, or pentafluoropropanol, since protonated solvents are more easily ionized. The alcohol solution of the liquid metal is obtained by dissolving the liquid metal in an alcohol solution, and the concentration of the solution is 20%.
In the embodiment, electrostatic spinning and electrostatic spraying are carried out simultaneously, liquid metal is sprayed into an electrostatic spinning net structure, liquid metal micro-nano particles can be better combined with a flexible elastomer material, the surface potential and the charge density of the stretching electrification layer 1 can be enhanced by the in-situ electret mode, and the electrical property output capacity of the friction nano generator is further improved.
Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.
Claims (10)
1. A stretchable friction nanogenerator, comprising:
the stretching electrification layer (1) is internally provided with a closed cavity, the closed cavity is suitable for being filled with liquid metal and comprises a first cavity (11) and a plurality of pore passages (12) distributed along the circumferential direction of the first cavity (11), and the liquid metal is suitable for flowing between the pore passages (12) and the first cavity (11);
an electrode layer (2), the electrode layer (2) being adapted to be connected to a surface of the charge stretching layer (1).
2. The stretchable triboelectric nanogenerator according to claim 1, wherein the first cavity (11) is of a positive poisson's ratio annular structure and the pore channel (12) is of a negative poisson's ratio annular structure, or wherein the first cavity (11) is of a negative poisson's ratio annular structure and the pore channel (12) is of a positive poisson's ratio structure.
3. The stretchable triboelectric nanogenerator according to claim 2, characterized in that the cross-sectional area of the end of the tunnel (12) connected to the first cavity (11) is smaller than the cross-sectional area of the end of the tunnel (12) remote from the first cavity (11).
4. The stretchable triboelectric nanogenerator according to claim 2, characterized in that said pore channel (12) comprises a second cavity (122) and a connecting channel (121), said connecting channel (121) being used to connect said first cavity (11) and said second cavity (122).
5. A method for preparing a stretchable friction nano-generator is characterized by comprising the following steps:
placing a precursor material of the stretching electrification layer (1) in a mould for curing treatment to obtain the stretching electrification layer (1) with a closed cavity arranged inside, wherein the closed cavity is suitable for being filled with liquid metal, the closed cavity comprises a first cavity (11) and a plurality of pore channels (12) distributed along the circumferential direction of the first cavity (11), and the liquid metal is suitable for flowing between the first cavity (11) and the pore channels (12);
preparing an electrode layer (2) by simultaneously carrying out high-voltage electrostatic spraying on the liquid metal micro-nano particles and high-voltage electrostatic spinning on the high-molecular elastomer material;
and assembling the stretching electrification layer (1) and the electrode layer (2) together to prepare the stretchable friction nano generator.
6. The method for preparing the stretchable friction nanogenerator according to claim 5, wherein the step of placing the precursor material of the stretching electrification layer (1) in a mold for curing treatment to obtain the stretching electrification layer (1) with a closed cavity defined inside comprises the following steps:
placing the precursor material of the stretching electrification layer (1) in a first mould for curing treatment to obtain a first model, wherein a groove structure is arranged on one surface of the first model, the groove structure comprises a first groove arranged in the middle of the first model and a plurality of second grooves arranged in the circumferential direction of the first groove, and the first groove is communicated with the second grooves;
filling the liquid metal into the groove structure;
pouring the precursor material of the stretching electrification layer (1) into a second mould, and carrying out curing treatment to obtain a second model, wherein the second model is a cover body suitable for covering the groove structure;
and covering the second model on the groove structure for curing treatment to finish the packaging of the first model and the second model, wherein the groove structure and the cover body surround to form the closed cavity of the stretching and electrification layer (1).
7. The method for preparing the stretchable friction nanogenerator according to claim 5, wherein the step of placing the precursor material of the stretching electrification layer (1) in a mold for curing treatment to obtain the stretching electrification layer (1) with a closed cavity defined inside comprises the following steps:
placing the precursor material of the stretching electrification layer (1) in a first mould for curing treatment to obtain a first model, wherein a groove structure is arranged on one surface of the first model, the groove structure comprises a first groove arranged in the middle of the first model and a plurality of second grooves arranged in the circumferential direction of the first groove, and the first groove is communicated with the second grooves;
filling liquid metal into the groove structure;
and packaging the two first models together, and enclosing the two groove structures to form the closed cavity of the stretching electrification layer (1).
8. The method for preparing the nano generator with stretchable friction according to claim 5, wherein the step of preparing the electrode layer (2) by simultaneously spraying the liquid metal micro-nano particles and the high-voltage electrostatic spinning the high-molecular elastomer material comprises the following steps:
preparing a fluorine-containing solution of a high-molecular elastomer material and an alcohol solution of liquid metal;
and simultaneously applying positive voltage to one end of the fluorine-containing solution of the high polymer elastomer material and one end of the alcohol solution of the liquid metal, applying negative voltage to the receiving roller, rotating the receiving roller, and simultaneously performing electrostatic spraying and electrostatic spinning to prepare the electrode layer (2).
9. The method for preparing a nano generator with stretchable friction according to claim 8, wherein the injection speed of the fluorine-containing solution of the high polymer elastomer material is (0.1-0.15) ml/min, and the injection speed of the alcohol solution of the liquid metal is (0.05-0.1) ml/min.
10. The method for preparing a nano generator capable of stretching friction according to claim 8, wherein the concentration of the fluorine-containing solution of the polymer elastomer material is 4-6%, and the concentration of the alcohol solution of the liquid metal is 20%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011083183.XA CN112260573B (en) | 2020-10-12 | 2020-10-12 | Stretchable friction nano generator and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011083183.XA CN112260573B (en) | 2020-10-12 | 2020-10-12 | Stretchable friction nano generator and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112260573A true CN112260573A (en) | 2021-01-22 |
| CN112260573B CN112260573B (en) | 2024-03-26 |
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